/*!
Create a normalized direction vector for an arbitraty set of rotation angles.
\param[in,out] dst The resulting direction vector will be stored in this variable.
\param[in] up_axis The up axis.
\param[in] rotx The X angle in degree.
\param[in] roty The Y angle in degree.
\param[in] rotz The Z angle in degree.
*/
void create_direction_vector( vec3 *dst, vec3 *up_axis, float rotx, float roty, float rotz )
{
vec4 rotation;
mat4 m;
mat4_identity( &m );
rotation.z = 1.0f;
rotation.x =
rotation.y = 0.0f;
rotation.w = rotz;
mat4_rotate( &m, &m, &rotation );
rotation.y = 1.0f;
rotation.x =
rotation.z = 0.0f;
rotation.w = roty;
mat4_rotate( &m, &m, &rotation );
rotation.x = 1.0f;
rotation.y =
rotation.z = 0.0f;
rotation.w = rotx;
mat4_rotate( &m, &m, &rotation );
vec3_invert( up_axis, up_axis );
vec3_multiply_mat4( dst, up_axis, &m );
}
void material_draw_callback(void *ptr)
{
OBJMATERIAL *objmaterial = (OBJMATERIAL *) ptr;
PROGRAM *program = objmaterial->program;
unsigned int i = 0;
while (i != program->uniform_count) {
if (!strcmp(program->uniform_array[i].name, "DIFFUSE")) {
glUniform1i(program->uniform_array[i].location, 1);
} else if (!strcmp(program->uniform_array[i].name, "MODELVIEWPROJECTIONMATRIX")) {
glUniformMatrix4fv(program->uniform_array[i].location, 1, GL_FALSE, (float *)GFX_get_modelview_projection_matrix());
} else if (!strcmp(program->uniform_array[i].name, "DISSOLVE")) {
glUniform1f(program->uniform_array[i].location, objmaterial->dissolve);
} else if (!strcmp(program->uniform_array[i].name, "AMBIENT_COLOR")) {
glUniform3fv(program->uniform_array[i].location, 1, (float *)&objmaterial->ambient);
} else if (!strcmp(program->uniform_array[i].name, "DIFFUSE_COLOR")) {
glUniform3fv(program->uniform_array[i].location, 1, (float *)&objmaterial->diffuse);
} else if (!strcmp(program->uniform_array[i].name, "SPECULAR_COLOR")) {
glUniform3fv(program->uniform_array[i].location, 1, (float *)&objmaterial->specular);
} else if (!strcmp(program->uniform_array[i].name, "SHININESS")) {
glUniform1f(program->uniform_array[i].location, objmaterial->specular_exponent * 0.128f);
} else if (!strcmp(program->uniform_array[i].name, "MODELVIEWMATRIX")) {
glUniformMatrix4fv(program->uniform_array[i].location, 1, GL_FALSE, (float *)GFX_get_modelview_matrix());
} else if (!strcmp(program->uniform_array[i].name, "PROJECTIONMATRIX")) {
glUniformMatrix4fv(program->uniform_array[i].location, 1, GL_FALSE, (float *)GFX_get_projection_matrix());
} else if (!strcmp(program->uniform_array[i].name, "NORMALMATRIX")) {
glUniformMatrix3fv(program->uniform_array[i].location, 1, GL_FALSE, (float *)GFX_get_normal_matrix());
} else if (!strcmp(program->uniform_array[i].name, "LIGHTPOSITION")) {
vec3 position = { 0.0f, -3.0f, 10.0f };
vec3 eyeposition = { 0.0f, 0.0f, 0.0f };
vec3_multiply_mat4(&eyeposition, &position, &gfx.modelview_matrix[gfx.modelview_matrix_index - 1]);
glUniform3fv(program->uniform_array[i].location, 1, (float *)&eyeposition);
}
++i;
}
}
void LAMP_get_direction_in_eye_space( LAMP *lamp, mat4 *m, vec3 *direction )
{
vec3_multiply_mat4( direction,
&lamp->direction,
m );
vec3_invert( direction, direction );
}